Question

Why are concave mirrors used in
solar devices?
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Answer 1

Explanation:

Concave mirrors are used in solar cookers. This is because they are the only type of mirrors that reflect sunlight to a single focal point. Concave mirrors absorb all the incident light and reflect it to a single focal point. This reflected light is very powerful because it carries a lot of thermal energy.

Answer 2

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Solar devices like solar cooker or solar water heater use solar energy to cook food or heat water.

When sun rays fall on the concave mirror, they converge and come together in the focal plane.

Due to convergence, the intensity of sun rays increases and the food or water is heated faster. Hence concave mirrors are used in solar devices.